FRANKFURT/ZURICH (Reuters) - Specialty chemicals group Clariant has hired Goldman Sachs as an additional adviser to help stave off an activist investor's campaign to derail its planned merger with U.S. peer Huntsman .

FRANKFURT/ZURICH (Reuters) - Specialty chemicals group Clariant has hired Goldman Sachs as an additional adviser to help stave off an activist investor's campaign to derail its planned merger with U.S. peer Huntsman .